Locking mechanism



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Feb. 4, I936.

Feb. 4, 1936. A. s. WHEELBARGER 2,029,303

LOCKING MECHANISM Filed Sept. 25, 19:51 2 Sheets Sheet *2 IN VEN TOR Y ((1 5 er! fljirrlh/qyer Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE LOCKING MECHANISM Application September 23, 1931, Serial No. 564,555

'7 Claims.

The object of this invention is to provide a locking means whereby the door of a register is locked by the shutting of the door or by the normal operation of the register and is unlocked only when a total print is taken from the totalizer. Unscrupulous persons have been known to open doors of registers, such as cash registers, so as to get to the internal mechanism thereof in an attempt to manipulate the totalizer wheels or to take out the printed record or to reset the totalizer. I have provided means whereby this door cannot be opened until the total print is taken and if the total print is taken, he will gain nothing by attempting to manipulate some of the internal mechanism of the register for illegal purposes.

Referring to the drawings:

Figure 1 is a side elevational view of the register frame showing a part of the operating and total printing mechanism.

Figure 2 is a detailed elevational view of the reverse side of the cam member shown in Figure 1 and the link operated thereby.

Figure 3 is an elevational view, partly in cross section, of the opposite side of the frame shown in Figure 1 showing certain parts mounted thereon, and

Figure 4 is a detailed elevational view of the locking means for the door.

For the purpose of illustration I have shown my invention as applied to the type of register totalizer and printing means therefor shown in the patent of Albert S. Wheelbarger and Grover C. C011, No. 1,876,118, patented September 6, 1932.

The casing I is provided with a door 2 hinged at 3 to the base 4 to which the side walls 5 of the frame are secured. The door 2 is provided with a locking hook Ii which as it is being closed engages a cam surface I of a bell crank lever B pivoted to a shaft 9, depressing the left hand end of said lever as viewed in Figure 4 and elevating the right hand end thereof which carries an arm III provided with a pin I I which underlies an unlocking slide 52. As the door is opened it is obvious that the pin II will be raised, elevating the left hand end of the slide I2 on its pivot I3 carried by a lever I4, which pivot I3 lies within a slot I5 of the unlocking slide I2. The slide I2 is provided with an upstanding arm I6 to which is attached a spring I! connected to an arm I8 of the lever B, which spring normally pulls the slide I2 into engagement with the pin I I. As the left hand end of the slide I2 is raised by means of the pin II, its nose I9 will be raised out of engagement with the arm carried by a lever 2| and a spring 22 will rotate the lever 2| clockwise so as to engage the locking nose 23 of the lever 2| behind the locking hook 6 so that when the door is closed it is locked in its closed position.

I have also provided means to lock the door in its closed position when the register is normally operated by rotating the hand crank 24 in an anti-clockwise direction as viewed in Figure 1. The hand crank 24 is secured to a shaft 25 which has a gear 26 rigidly mounted thereon which meshes with and drives a gear 21 secured to a stud shaft 28. A gear 29 is also secured to said shaft 28 and meshes with and drives a gear 30 secured to a main operating shaft 3| which is rotated in an anti-clockwise direction as viewed in Figure 1 or in a clockwise direction as viewed in Figure 2. Of course, this shaft may be driven by a motor if desired. A disk 32 is provided with a cam race 33 on its outer face and a cam race 34 on its inner face. A roller 35 lies within the cam race 33 and is mounted on a pin 36 carried by a bell crank lever 31 pivoted on a pin 38, which lever has arms 39 and 4|). The arm 39 carries a pin 4| connected to a pin 42 carried by a lever 43 by means of a spring 44. The lever 43 actuates a totalizer frame 45 to move the totalizer into and out of mesh with differential segments as shown in said application Serial No. 238,662, which invention forms no part of the present invention and need not be shown or described.

The cam race 34 receives a roller 46 mounted on a pin 41 carried by a link 48 bifurcated at its lower end so as to straddle a guide pin 49. The upper end of the link 48 is provided with a pin 50 mounted on a lever 5| pivoted on a shaft 52, which lever is provided with a segmental gear 53 which meshes with and drives a gear 54 which operates the transfer mechanism of the totalizer and which forms no part of the present invention. It is obvious that as the shaft 3| is rotated the link 48 will be raised and lowered and as it is raised the upper end of the lever 5| will engage a pin 55 carried by the slide I2 and extending through an opening 56in the side wall 5, thereby raising the pin 55 and the slide I2 so that if the operator has taken a total print, as will be hereafter described, and thereby unlocks the door and if he fails to open the door (and frequently it would not be necessary or desirable unlocked so that the operator can open it. A hand knob 51 extends to the outside of the machine so that the operator can grasp it and rotate it. As viewed in Figure 1, he cannot rotate it in an anti-clockwise direction for the hand knob 51 is secured to a shaft 58 to which a cam 59 is also secured, which cam has an abrupt face which in its normal position lies adjacent an anti-rotation pawl 6|. He can, however, rotate it in a clockwise direction and when so rotated it will engage a nose 62 on the lever 40 and will move this lever downwardly as viewed in Figure 1 against the tension of the spring 44. As the shaft 58 is rotated by the hand knob 51 it will rotate a disk 63 secured thereto which is provided with a wrist pin 54 connected to a link 65.

A pin 66 connects the link to a lever 61 pivoted on a shaft 69 which has its upper end bifurcated to receive a pin 69 carried by the lower end of the lever I4 pivoted on a shaft Ill. The lever 61 is provided with a slot 'II which receives one end of a shaft I2 on which is mounted a platen I3. The said shaft I2 extends through slots I4 in the side walls 5 of the machine. The shaft I2 serves as a support for a bell crank lever I5 which receives a shaft IE on which an ink roller 11 is mounted. When the hand knob 51 is rotated it will move the shaft 12 on which is mounted the platen I3 and the ink roller 1! to the left as viewed in Figure 3 so as to bring the ink roller against the lowermost type on the totalizer printing wheels. 18 to ink the same and as the shaft I2 is moved to the left as viewed in Figure 3 it will ride upwardly in the slots I4 and slot II so that it will be brought against the type wheels which have been freshly inked and will press the paper strip I9 against the same so as to make a total print thereon. This anti-clockwise rotation of the lever 61 will produce a clockwise rotation of the lever l4 and the pin l3 will move to the right hand end of the slot I5 as viewed in Figure 3 and then pick up the slide l2 and move it to the right so that the nose I9 will drop oiI the arm 20 of the lever 2|. The spring II will now move the nose I9 downwardly into the position shown in Figure 4. The levers GI and I4 will, after the wrist pin 64 has completed one-half of its rotation, be rotated in reverse directions than those described above which will move the slide l2 to the left as viewed in Figures 3 and 4 so that the nose I9 will push the arm 20 rotating the lever 2| anti-clockwise and disengaging its locking nose 23 from the locking hook 6 so that the door 2 can be opened.

As the door is opened the hook 6 engages the inner cam surface 1, rocking the lever 8 anticlockwise, thereby raising the pin II and elevating the left-hand side of the slide I2 so that the nose I9 of the lever l2 will be above the arm 20 of the lever 2 I. The spring 22 now moves the lever 2| clockwise but this does not take place until after the hook 6 has moved beyond the nose 23. When the door is then closed the hook 6 engages the outer cam surface of the levers 8 and 2| depressing both of said levers but without imparting any movement to the slide I2 as it is already elevated. As soon as the hook 6 passes beyond the noses of the levers 2| and 23 the left-hand ends of these levers move upwardly into the position shown in Figure 3 so that it would be impossible to open the door because the nose 23 is now in engagement with the hook 6.

By means of the above described mechanism it is obvious that the door is locked whenever the operator closes the same and that it remains locked until a total print is taken, whereupon it is unlocked. It is furthuer obvious that if a total print is taken and the operator does not open the door, the door will again be looked as soon as he operates the main drive shaft 3| by means of the crank handle. or motor.

I realize that many changes may be made in the specific form of this invention shown and described by way of illustration in this application and I, therefore, reserve the right to make such changes in the specific form of the invention as shown herein as I may find to be desirable. I, therefore, claim the invention broadly except as I may limit myself by the appended claims.

Having now described my invention, I claim:

1. In a register, a totalizer, a door, serving as a closure for said totalizer, operating means for said totalizer, means controlled by said operating means to lock said door when the register is operated, a printer, and means controlled by the printer to unlock said first mentioned means when the printer is actuated.

2. In a register, a door, a locking hook carried by said door, a locking lever adapted to engage said hook and hold said door in locked position, means whereby the locking lever is moved into locking position whenever said door is closed or said register is operated to enter an item, a total printer, and means actuated by said printer to remove said locking lever from engagement with said locking hook when the printer is actuated.

3. In a register, a door, a locking hook carried by said door, a locking lever adapted to engage said hook, a second lever provided with a cam surface, said cam surface being so positioned that when said door is opened said locking hook will engage said cam surface and rock said second lever, and means whereby the rocking of said second lever by the opening of the door will cause said locking lever to be actuated so as to bring it in looking engagement with said hook when the door is closed to retain the door in its closed position.

4. In a register, a totalizer, a door serving as a closure for said totalizer, a locking book carried by said door, a locking lever adapted to engage said hook and hold said door in locked position, a slide, a printer whereby the amount standing on the totalizer may be taken, and means operatively connecting said printer and slide so that when said printer is actuated said slide will be actuated to engage said locking lever and to remove it from looking engagement with said hook.

5. In combination, a casing, a door for said casing, a totalizer housed within said casing and behind said door, a printer, means to lock said door when it is closed so as to render the totalizer inaccessible, and means to unlock said door near the end of the cycle of the printer when said printer is operated.

6. In a register, a totalizer, actuating means therefor, a door serving as a closure for said totalizer, a locking hook carried by said door, a locking lever adapted to engage said hook and hold said door in locked position, means whereby the locking lever is moved into locking position whenever said door is closed or said actuating means is operated, a printer whereby the amount standing on the totalizer may be printed, and means actuated by said printer to remove said locking lever from engagement with said looking hook when the printer is actuated.

7. In a register, a door, a locking hook carried by said door, a locking lever adapted to engage said hook and hold said door in locked position, a slide, a printer, means operatively connecting said printer and slide so that when said printer is actuated said slide will be moved to actuate said locking lever and to hold it out of locking engagement with said hook, means to elevate said slide out of engagement with said locking lever when the door is being opened, and means to move said locking lever so as to again lock said door when the door is thereafter shut.

ALBERT S WHEELBARGER. 

